1 files changed, 10 insertions, 4 deletions
diff --git a/arch/mips/kernel/csrc-ioasic.c b/arch/mips/kernel/csrc-ioasic.c
index 0654bff9b69c..6cbbf6e106b9 100644
--- a/arch/mips/kernel/csrc-ioasic.c
+++ b/arch/mips/kernel/csrc-ioasic.c
@@ -37,13 +37,13 @@ static struct clocksource clocksource_dec = {
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-void __init dec_ioasic_clocksource_init(void)
+int __init dec_ioasic_clocksource_init(void)
 {
 	unsigned int freq;
 	u32 start, end;
-	int i = HZ / 10;
-
+	int i = HZ / 8;
 
+	ds1287_timer_state();
 	while (!ds1287_timer_state())
 		;
 
@@ -55,9 +55,15 @@ void __init dec_ioasic_clocksource_init(void)
 
 	end = dec_ioasic_hpt_read(&clocksource_dec);
 
-	freq = (end - start) * 10;
+	freq = (end - start) * 8;
+
+	/* An early revision of the I/O ASIC didn't have the counter.  */
+	if (!freq)
+		return -ENXIO;
+
 	printk(KERN_INFO "I/O ASIC clock frequency %dHz\n", freq);
 
 	clocksource_dec.rating = 200 + freq / 10000000;
 	clocksource_register_hz(&clocksource_dec, freq);
+	return 0;
 }